A work tool (100) comprising: a cutting chain (110), a drive mechanism for driving the cutting chain (110), an annular member (120) arranged rotatably supported by one or more support rollers (130,140,150), wherein the annular member comprises a rim (230) adapted to support the cutting chain (110) during cutting, and a support wheel (160) arranged distanced from the annular member (120), wherein the cutting chain (110) is arranged supported on a rim segment (102) of the annular member (110) forming part of a cutting area of the tool (100) and supported on a rim segment (103) of the support wheel (160) in a direction away from the cutting area of the tool (100). An annular member and a method of producing an annular member are also disclosed.

A dual-spindle circular saw (1) for sawing wood (2) with two saw groups (3) is proposed, wherein each saw group (3) comprises a drive (7) having an armature (5) and a stator (6) for rotary driving of a saw spindle (9) which is mounted in a housing (8) and which is connected in a rotationally fixed manner to at least one saw tool (11) comprising at least one exchangeable circular saw blade (10), and wherein the center distance (A) of the saw spindles (9) is adjustable by means of an actuator. In order to create particularly advantageous design conditions, it is proposed that the armature (5) is arranged in a rotationally fixed manner on the saw spindle (9) and the stator (6) is arranged in a rotationally fixed manner in the housing (8) between a fixed bearing (13) and a floating bearing (14) of the saw spindle (9), wherein the saw tool (11) is floatingly mounted on the saw spindle (9).

A dual-spindle circular saw (1) for sawing wood (2) with two saw groups (3) is proposed, wherein each saw group (3) comprises a drive (7) having an armature (5) and a stator (6) for rotary driving of a saw spindle (9) which is mounted in a housing (8) and which is connected in a rotationally fixed manner to at least one saw tool (11) comprising at least one exchangeable circular saw blade (10), and wherein the center distance (A) of the saw spindles (9) is adjustable by means of an actuator. In order to create particularly advantageous design conditions, it is proposed that the armature (5) is arranged in a rotationally fixed manner on the saw spindle (9) and the stator (6) is arranged in a rotationally fixed manner in the housing (8) between a fixed bearing (13) and a floating bearing (14) of the saw spindle (9), wherein the saw tool (11) is floatingly mounted on the saw spindle (9).

A track saw assembly is provided including a track saw (i.e., a circular saw) having a shoe translatable upon a track. Various mechanisms control plunging of a saw unit and saw blade of the track saw relative to the shoe. For example, a plunge lockout mechanism is provided to prevent engagement of a trigger and prevent movement of a plunge mechanism. Various mechanisms control bevel angle adjustment of the saw unit relative to the shoe. For example, a linkage is provided and is operable to shift between a first position and a second position. In the first position, a bevel angle is restricted within a first bevel angle range. In the second position, the bevel angle is restricted within an expanded second bevel angle range. Other concepts relate to the interface between the shoe and the track and a clamp which secures the track to a workpiece.

A track saw assembly is provided including a track saw (i.e., a circular saw) having a shoe translatable upon a track. Various mechanisms control plunging of a saw unit and saw blade of the track saw relative to the shoe. For example, a plunge lockout mechanism is provided to prevent engagement of a trigger and prevent movement of a plunge mechanism. Various mechanisms control bevel angle adjustment of the saw unit relative to the shoe. For example, a linkage is provided and is operable to shift between a first position and a second position. In the first position, a bevel angle is restricted within a first bevel angle range. In the second position, the bevel angle is restricted within an expanded second bevel angle range. Other concepts relate to the interface between the shoe and the track and a clamp which secures the track to a workpiece.

The cordless power cutter that is lightweight and weight-balanced between a power section housing a battery pack as a power source and a cutting section including a motor in a belt-free drive system and rotatable disk blade. The weight balancing of the cordless power cutter allows the tool to remain parallel to a horizontal surface, such as the ground, without tilting, when the operator lifts and holds the tool by only a gripping or transverse portion of the lifting handle. The motor has a motor axis that is not perpendicular to the disk axis and that is rearward of the disk axis to provide a depth of cut. The weight-balance and motor positioning allows the cordless power cutter to achieve ease of handling and operation.

The cordless power cutter that is lightweight and weight-balanced between a power section housing a battery pack as a power source and a cutting section including a motor in a belt-free drive system and rotatable disk blade. The weight balancing of the cordless power cutter allows the tool to remain parallel to a horizontal surface, such as the ground, without tilting, when the operator lifts and holds the tool by only a gripping or transverse portion of the lifting handle. The motor has a motor axis that is not perpendicular to the disk axis and that is rearward of the disk axis to provide a depth of cut. The weight-balance and motor positioning allows the cordless power cutter to achieve ease of handling and operation.

A handheld cut-off saw (300) for cutting concrete and stone, the handheld cut-off saw comprising a drive arrangement (100, 200, 600, 800) for driving a circular cutting tool (110), the drive arrangement comprising: a belt drive portion (120) comprising a first pulley (121) and a second pulley (122), wherein the first pulley is arranged to be powered by a power source (130) and to drive the second pulley via a belt (123), wherein the second pulley (122) has a larger pitch diameter than the first pulley (121); and a gear transmission portion (140) comprising a first gearwheel (141) and a second gearwheel (142), wherein the first gearwheel (141) is co-axially connected to the second pulley (122) and radially connected to the second gearwheel (142), and wherein the second gearwheel (142) is arranged to be co-axially connected to the circular cutting tool (110).

An electric powered work machine according to one aspect of to the present disclosure includes a motor. The electric powered work machine includes a first line connecting a positive electrode of a battery to the motor. The electric powered work machine includes a second line connecting a negative electrode of the battery to the motor. The electric powered work machine includes a third line connecting the first line to the second line. The electric powered work machine includes a first capacitor disposed on the third line. The electric powered work machine includes a rectifier disposed on the third line. The rectifier limits or inhibits an electric current flowing from the second line to the first line through the third line. The electric powered work machine includes a first circuit connected to the third line. The first circuit has impedance that is other than zero, and bypasses the rectifier.

An electric powered work machine according to one aspect of the present disclosure includes: a tool; a motor; a manual switch; an electric current path; a shunt resistor; a reference voltage generation circuit; and an electric current measurement circuit. The reference voltage generation circuit (i) generates a reference voltage having a first magnitude in response to a first condition being established, and (ii) generates the reference voltage having a second magnitude in response to the first condition not being established. The electric current measurement circuit (i) receives the reference voltage and a measured voltage, and (ii) outputs an output voltage based on the reference voltage and the measured voltage.